ATHENA offers you this spare gasket pack for the ATHENA aluminum kit P400210100029 mounted on motocross HONDA CRF 450cc R from 2009 to 2016. This gasket pack includes the base gasket, the reinforced cylinder head gasket and the timing chain tensioner gasket. This gasket pack is designed for the ATHENA 96mm kit but can also be mounted on the original 96mm cylinder.